Camping is Good. Part One (How we go

8 Track Tapes - Probably the first media containing "on demand" music. These could go with you in your car if you had an 8 track player. But, there was no rewind. If you wanted to hear that song again, you forwarded until you thought you were close enough to it, then hit play, forward, play, forward, oops...missed the beginning of the song...forward, play, forward...